Lamp.



No. 654,343. Patented my 24, |900. n. M. nlxoN.

L A M P (Application medl sept. s, 1597.)

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THE NOHR S PETERS CO PHOTO LITHO WASPINGTON u Patented July 274,A i900. R. M. DIXON.

L A M P.

(Applieaton led Sept. 8, 1897.)

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ROBERT MUNN DIxON, OE EAST ORANeEfNEw JERSEY, ASSIGNOR To 'TI-IE SAFETY OAR HEATINGr AND LIGHTING COMPANY, OE NEW JERSEY.

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s'PEcIEIcATIoNformIng part of yLetters Patent No. 654,343, dated my 24, Ieoo. Applicata nea september s, 1h97. Serial No. 650,963. nro aan.)

To all whom it may col/werft.-

Be it known that I, ROBERT MUNN DIXON, of East Orange, in the county of Essex, State of New Jersey, have invented certain new and useful Improvements in Lamps, of which the following is a complete specification, reference being had to the accompanying drawings.

The object of my invention is to produce improvements in lamps of theinverted regen'- erative Argand burner type referred to in ap plioation Serial No. 614,285, iiled December 3, 1896, whereby the extensive area of radiation of light from the flame of the lamp referred to in that application is secured without perforating or obstructing the wall of the mica chimney through which radiation through the top ofthe lamp proceeds.

In the accompanying drawings, Figure I is a central vertical Asectional view of my lamp, partly in elevation. Fig. II is a top plan View of my center casting detached. Fig. III isa section on the line III III of Fig. II; Fig. IV is a section on the line IV IV of Fig. II. Fig. V is a section on the line V V of Fig. III.

Referring to the figures on the drawings, 1 indicates a mainsupporting metallic framepiece, illustrated as of usual circularshape. It sustains, as upon its upper sides, the legs 2 and 3 o`f an open or spider frame. lower edge, as by the ordinary hinge, (not illustrated,) is movably secured in the ordinary manner a ring 4, which is adaptedin practice to be Sustained upon the sideopposite its hinge against the edge of theframe l by any ordinary mechanism. (Not illustrated.) The ring carries a pendent transparent or glass globe 5, having an inverted edge 6, that upon a llet 7 is supported on an -inturned iiange 8 of the ring 4.

The frame-piece lis designed to be supported in" the usual manner by pendent bracket-arms, (not illustrated,) and is for that purpose provided with externally-opening internally-soreWthreaded apertures 9 and 10, Such as ,are ordinarily employed for the reception of bracketarms.` O ne of such apertures-as, for example, the one numbered 9-is designed to receive a bracket-support To its of tubular Structure, which affords means of communication with a source of gas-supply.

(Not illustrated.)

y rIhe legs 2 and 3 of the Spiderframe sustain a headpiece ll, with which the legs are prefchamber I4. The lower end of the gas-chamber is closed, as by a threaded plug or disk l5, which carries burner-tubes I6 of well-known type, suitably spaced one from the other and Whose lower ends are held in uniform'iixed positions as by a ring I7. Y

In practice an everted ilame issues from the lower ends of the burner-tubes, between which is carried the foraminousburner shell or spreader 1S, whose ofiice is well understood in the art. v

The bore of the pendent projection I2 communicates, through a duct 19in the headpiece Il, with a pipe 20, that in like manner through gas-tight joints communicates with the aperture 9 and through it, in the manner above specified, with the source of gas-supply. The head Il of the spider-frame is provided with an internally-Screw-threaded tubular stud 2l, into which is screwed a tine-post` 22, which carries upon its upper screw-threaded end a vtop ring 23, adapt-ed to secure in place the upper end of a fourfold lue 24, whose lower end extends through the head 11 of the spiderthe chimney 26 and affords means of final exit of the products of combustion from the lamp.

The chimney 26 is providedwith meansas, for example, an externally-supported ring BO- whereby a transparent dome 3l is secured to the chimney, so as to be raised or depressed by the movement of the latter. The dome is preferably of such extent as to provide between the ring 1 and its lower edge an annular air-supply inlet 32.

The presence of the air-supply inlet 32 is a preferable feature, as are the independent means of adjustment between the dome 31 and the chimney 26, the width of the air-inlet 32 and of the air-space 27 being by that means relatively adjustable. The particular form of construction illustrated, however, is not regarded as essential.

33 indicates an annular reflector or horizontally-disposed partition-plate. The partitionplate 33 is similar in form and function to the corresponding element specified in the application above referred to and is for similar reasons provided with an inclined zone 34, with apertures 35, and with an upturned annular inner edge 36 for the support of a transparent chimney 37. The zone 34 serves to define the inwardly-discharging annular air-chamber38, to which air from the upper part of the lamp gains access through the apertures 35. The plate 3,3 is also provided upon its lower side with a polished reflecting-surface. The partition-plate 33 may be supported against the bottom of the frame 1, as by hooks 39, which press it against a yielding fillet 40, embedded in the bottom of the frame 1.

With few exceptions, and those determinable by comparison, the construction above specified is substantially that of the subjectmatterof application Serial No. 614,185, above referred to.

The distinctive feature of my present invention consists in the employment of means for communicating air to the burner from above the transparent chimney 37 without in any wise obstructing its transparency or perforating its wall. To accomplish this object, I em-ploy a member of peculiar structure, which for the want of a better term I denominate my center casting, it being preferably made of castmetal and carried in Ythe central partof the body'of the lamp.

The details of the center casting, as specifically illustrated'in Figs. II to V, inclusive, comprehend, as clearly brought out in Fig. IV, a body part 41, resembling in form a cupola, the head or dome of which is broken by l a collar 42, by which, fitting around the threaded end 13 of the pendent projection 12 and sustained by the member 14, is supported the center casting. The wall of the body part 41, or cupola7 as it may be otherwise denominated, is pierced by a series of slits 43, which communicate,respectively, with downwardlytapering lateral air-chambers 44, through which air is admitted from under the dome 31 to the burner that is surrounded by the center' casting. Four chambers 44 are shown in the drawings by way of illustration.

The center casting is provided at its upper end with an annular plate or disk head 45, whose outer edge is provided with a downward-lydisposed iiange 46, that in the assembled lamp overlaps the upper edge of the chimney 37 and holds it in place upon the upturned edge 36 of the plate 33.

Preferably arranged alternately with the chambers 44 I provide, through the plate 45, fiue-apertures,defined byprojectingflue-seats 47,whose upper edges are preferably beveled, as indicated at 48, to accommodate the flared ends 49 of the flues 24, so as to conveniently afford a suitably-close union between the liues and their seats.

In the lower end of the center casting I prefer to provide an air-controller which upon its lower Aflanged edge 50 supports an annular reflector 51 around the lower end of the burner.

The air-controller is preferably supported within the center casting, as by bayonetjoints, consisting of angular recesses 52 in the end wall of the controller and corresponding `pins 53, extending radially from the inner wall of the center casting.

In operation gas being supplied to the interior of the chamber 14 issues from the lower ends of the tubes 16 and is there ignited to support the flame of combustion. Air enters freely through the air-inlets 32 and the slits 28 in the chimney 26. air thus supplied within the dome v31 a portion passing through the apertures 35 enters the interior of the globe 5 underneath the burner. So much of the remaining portion of the volume of air as is required enters through the chambers 44 and isv admitted to the burner from above, access to the interior of the burner being afforded in the usual mannerthrough the spaces between the tubes 16.

The products of combustion from the burner pass upwardly from the burner with the liame around the reiiector 51 and into the chimney 37. Confined between the chimney 37 and the center casting they finally gain egress through the fiues 24 and are thence discharged` through the extension-chimney 29. The air supplied from above the chimney, on the contrary, descends through the downwardlytapered chambers 44 to the upper and inner surface of the flame, the outer surface of which is supplied with air mainly through the apertures 35 in the partition-plate 33.

By the arrangement of the air-chambers 44 the regenerative operation of the burner is improved, the incoming vcurrents of air descending through the chambers 44 being thereby confined fora longer period in proximity to the heat derived from the ascending currents of the products of combustion,

From the volume of IOO IIO

The exterior surface of the center casting v is of s uch a form as to constitute a desirable reiiector for reflecting such light as strikes it and to increase the amount of useful reflecting-surface over existing lamps of' the same general class.

1. In a lamp, the combination with a frame of open-work construction, and a burner, of

means, surrounding the burner, for protecting it against injurious drafts, said means comprehendinga chimney, in operative relation with the burner, said chimney being closed, except at the top and bottom, and means within the chimney for supplying air to the burner from above the chimney, substantially as set forth.

2. In a lamp, the combination with a frame of open-work construction and a burner, of means for protecting the burner against injurious drafts, said means comprehending a transparent dome above and a transparent bowl below the burner, and a transparent chimney within the dome and bowl, in operative relation with the burner, and means within the chimney of supplying air to the burner from above the chimney, substantially as set forth. Y

3. In a lamp of the inverted-burner type, the combination with a burner, and frame of open-work construction, of transparent inclosing members, a horizontal annular partition separating the said members, a transparent chimney surmounting the partition and means within the chimney for conveying air to the burner from above the same, substantially as set forth.

4. In a lamp of the inverted-burner type, the combination with its burner, of a member, closed, save at top and bottom, surmounting the burner, and provided throughout its longitudinal extent with means for the passage in opposite directions of air-currents and the currents of the products of combustion, whereby the regenerative action of the lamp is improved, substantially as set forth.

5. In alamp, the combination with a frame, and a burner, of means for protecting the burner against injurious drafts, said means comprehending a chimney in operative relation with the burner, and a center casting within the chimney, adapted to separate incoming currents of air and outgoing products of combustion, substantially as set forth.

6. In a lamp, the combination with a frame, and a burner, ot' means for protecting the burner against injurious drafts, said means comprehending a chimney in operative relation with the burner, and a center casting within the chimney, said center casting being divided by passages extending vertically through the same and adapted to accommoe date opposing currents of air and the products of combustion, and separate fines communicating with one set of passages and not with the other, substantially as set forth.

7. In a lamp of the inverted-burner type, the combination with a frame and a burner, of means for protecting the burner against injurious drafts, said means comprehending a chimney in operative relation with the burner, and a center casting within the chimi ney, said center casting being provided with chambers tapering toward the burner and with a narrow wall surrounding the burner, whereby a iiame from the burner is discharged upwardly between the chimney and the wall of the center casting, and air through the tapering chambers is discharged against the upper surface of the dame, substantially as set forth.

8. In a lamp of the inverted-burner type, the combination with a frame and a burner, of means for protecting the burner .against injurious drafts, said means comprehending a chimney in operative lrelation with the burner, and a center casting within the chimney, said center casting being provided with chambers tapering toward the burner and with a narrow wall surrounding the burner,

whereby a flame from the burner is discharged In testimony of all which I have hereunto 9o subscribed my name.

ROBERT MUNN DIXON.

Witnesses:

E. W. BULKLEY, ERNEsT F. SLOOUM. 

